Staff Backend Engineer, Distributed Commerce Systems

Mollkom; Riyadh; Hybrid; SAR 180,000 - 240,000; Full time

Job summary

Mollkom is seeking a backend engineer to design services, APIs, and events for orders, inventory and fulfillment. You will ensure consistency, concurrency, transactions and webhooks while driving design reviews and high-quality delivery.

The role requires deep experience with PostgreSQL and modern languages (TypeScript, Go or Python). Hybrid work in Riyadh, Saudi Arabia is available, with ownership of service boundaries and observability improvements.

Qualifications

• Deep backend engineering experience with distributed systems in use.
• Understanding of concurrency, idempotency and event-driven architecture.
• Ability to lead technical work, simplify systems and document trade-offs.

Responsibilities

• Design services, API contracts and events for orders, inventory and fulfillment.
• Handle consistency, concurrency, transactions, webhooks and compensating actions.
• Develop tenant isolation, permissions, auditability and service ownership boundaries.
• Improve observability, performance and testing while leading design and incident reviews.

Skills

Deep backend engineering

Distributed systems

Concurrency and idempotency

Lead technical work

Tools

PostgreSQL

TypeScript

Go

Python

Job description

One business can span a storefront, marketplace, POS, warehouse and carrier. Lead decisions that connect these paths without losing state or duplicating effects, giving the product a foundation it can grow with.

Responsibilities

• Design services, API contracts and events for orders, inventory and fulfillment.
• Handle consistency, concurrency, transactions, webhooks and compensating actions.
• Develop tenant isolation, permissions, auditability and service ownership boundaries.
• Improve observability, performance and testing while leading design and incident reviews.

Qualifications

• Deep backend engineering experience with distributed systems in use.
• Strong PostgreSQL and TypeScript, Go or Python.
• Understanding of concurrency, idempotency and event-driven architecture.
• Ability to lead technical work, simplify systems and document trade-offs.

Hybrid in Riyadh, Saudi Arabia.